Machine foe sawing shingles from the bolt



UNITED STATES PATENT OFFICE.

ALEXANDER B. MCCANS, OF ASHLEY, MISSOURI.

MACHINE FOR SAWING SHINGLES FROM THE BOLT.

Specification of Letters Patent No. 22,567, dated January 11, 1859.

To all whom 'it may concern:

Be it known that I, ALEXANDER B. MGCANS, of Ashley, in the county ofPike and State of Missouri, have invented certain new and usefulImprovements in Machines for Sawing Shingles; and I do hereby declarethe following to be a full, clear, and exact description of theconstruction and operation of the same, reference being had to theaccolnpanying drawings, making a part of this specification, in which-Figure l represents a perspective view of the machine, and Figs. 2, 3,and 4t represent detached portions thereof, the operat-ion of which arenot so distinctly shown in Fig. l.

Similar letters of reference where they occur in the separate figuresdenote like parts in all of them.

My invention consists first, in the combination of devices, for swingingthe saw past the bolt so as to saw off the shingles, and for returningit again for the next succeeding similar operation, and secondly, in thecombination of devices for setting the bolt, to give the proper taper tothe 'shingles which are cut butt and point therefrom.

To enable others skilled in the art to make and use my invention, I willproceed to describe the same with reference to the drawings.

A, represents a main frame, upon one end of which is raised a secondframe B. In the frame B, is hung a pulley C, which may be driven by anyfirst moving power, and around this pulley C, and around another smallerpulley a, in a swinging arm D, passes an endless belt Z), Z), said beltbetween its two pulleys passing over and resting on two friction rollersc, c hung in a mortise CZ, in a sliding bar E, the object of whichsliding bar will be hereafter explained. To the swinging arm D, isattached one end of a cord or chain e, which passes over a frictionroller f, and to its other end is fastened a heavy weight F, that willdraw said arm, when not otherwise operated upon, to that side of themachine. To the same shaft on which the pulley a is fastened, is alsofastened the saw G, so that they revolve to-y gether.

tional cog gear or spur 7L, the cogs of which take into a straight rackz', on the sliding bar E, and raise up said bar, but when the portion ofsaid gear 7i., comes around which has no teeth or cogs upon it the barE, immediately drops, and thus slacking the belt L, allows the weight F,to draw back the saw G, said saw having, by the rising of the bar E,been drawn through the bolt and sawed a shingle from it.

K, is a table upon which the bolt, from which the shingles are to becut, is placed, and L, is a follower for feeding up the bolt to the saw,the follower being operated as follows: On the shaft H, there is a studor dog 7c, which at every revolution of said shaft takes into one of theteeth or cogs of wheel M, fixed on a cross shaft N, that is supported inmain frame, and gives to said wheel and shaft sufficient motion to feedup the bolt to the extent of the thickness of one shingle. On this shaftN, and underneath the table K, there is a spur wheel O, that takes intoa rack P, attached to the rear of the follower L, and thusintermittently feeds up said follower and the bolt in advance of it. Thetable K, is pivoted to the frame at Z, and underneath the after part ofsaid table there is a cross head m (Figs. 2, 3, 4) which is pivoted tothe cross piece Q of the frame by a pivot or pin n, and a stud 0, onsaid cross head projects up through a slot or hole in the table. Twochanging bars R, B, are pivoted to this cross head by their ends, theopposite ends of which have hooks or catches r, 91, on them, which arethrown apart and held together by springs s, s. yThe shaft I-I, directlyunder these hooks or catches carries a cam t (Fig. 3) which comes upthrough the slot or opening o between said catches, and taking into thehook a of bar R nearestto it moves it forward and forces out the otherbar of the pair, until its opening in rear of said hook, when the springwillthrow the other hook into the recess (as shown by the two positionsof the hooks in Figs. 2, 4L) and thus shift the table so as to take thepoints and butts of the shingle from alternate ends of the bolt. As thefollower L, (and of consequence the bolt) is fed up to the saw, itraises up a weight S, that is connected to the rack u and attached tosaid follower by the cord w, which passes over a pulley m in the rearend of the table K, and a dog a that catches behind the teeth of therack u, holds the follower from slipping back. When the bolt is sawedup, and it is necessary to put another one on the table, the dog z, israised up, and the falling weight S, immediately runs back the follower,so that the new bolt may be readily placed on the table. There may bedogs or points on the follower to hold the bolt firmly to it, or theways y, y, between which the bolt and follower travels may be foundsufficient for this purpose.

The sliding bar E, is held against the fender post T, by guides p, p, sothat said bar may rise and fall, but be guided in its motions thereby.

The operation of the machine is as follows: The bolt being properlyplaced, and brought under the path of the saw, motion is communicated tothe pulley C, which runs in the direction shown by the red arrow. Thisraises up the bar E, by means of the spur 7L, and rack z', and draws thesaw, in the swinging arm D, across the bolt, and severs a shingletherefrom. By the time this is done the spur 7L runs out of the rack andthe bar E, drops, the falling weight F, draws back the saw and arm D,into position for the next operation. As soon as the saw is drawn backthe tooth if: takes into one of the cogs of the feed wheel M, and turnsthe shaft N, which causes its spur wheel O, to take into the rack P, andthus feed up the follower and block in advance of it for the nextshingle. At the same time also the cam on the shaft H takes into one ofthe hooks 1*, of one of the bars R, and carrying it along a shortdistance shifts the table, so as to take the point of the shingle fromthat end of the bolt from which the butt of the previous shingle wascut, and so on.

Having thus fully described the nature, object, and operation of mymachine, what I claim therein as new and desire to secure by LettersPatent isl. In combination with a saw hung in a swinging arm the spurIt, rack z', and sliding bar E, for drawing said saw through the bolt tosever the shingle therefrom and to trip and allow the saw to fall backfor the next similar operation, substantially as described.

2. I also claim in combination with a V pivoted table for holding thebolt, the shifting bars R, R, arranged and operating substantially asherein described for bringing the bolt up to the saw inl such manner asto alternately reverse the ends of said bolt from which the butts andpoints of the shingles are cut as set forth.

ALEXANDER B. MGCANS.

lVitnesses:

S. A. BRYANT, J. N. OBR.

